Bookbinding apparatus.



J.- TRTTMPER. BOOKBINDING APPARATUS. APPLICATION FILED MAILS, 1913.

1,1 31,877. Patented Mar 16, 1915.

INVENTOR WE ATTORNEY THE NORRIS PETERS ca. FHOTO-LITHOH WASHINGTON. D. C

TJNTT JULIUS TRUNK-"BER, 0E TEMPELHOF,

BOOKBINDING APPARATUS.

Application filed March 3, 1913.

To all whom it may concern Be it known that I, JULIUs Tnr'iMPnR, asubject of the German Emperor, and residing at Tempelhof, near Berlin,Germany, have invented certain new and useful Improvements inBookbinding Apparatus, of which the following is a specification.

This invention relates to a device for finishing the rounded corners ofbook covers, posters, pictures or the like by means of flexible materialextending over said corners, the material being folded over on theinside of the covers or on the back of the pictures and postersrespectively.

An object of the invention is to provide a device of the characterdescribed wherein means are provided for evenly pulling outstandingportions of a flexible material over the rounded corner of a plate andto hold said material in engagement with the plate until it is securedthereto.

Another object of the invention is to pro vide a device which willfirmly engage the cover of a book or the like and which willsimultaneously draw a part of a flexible material in diagonal directiontoward the holding element, while another part is pressed against thesurface of the cover.

Another object of the invention is to provide a device wherein the meansfor pulling the flexible material over the corner of the book cover isautomatically released from engagement with said material when thedevice itself is lifted from the cover, or when the pressure with whichsaid device is forced against the cover is released.

With these and other objects in view I have illustrated an embodiment ofthe invention in the accompanying drawing in which- Figure 1 is a sideelevation of the device. Fig. 2 is a top plan view of the base-plate forthe device, a book cover with the cloth on the same being shown inposition on the base-plate in dotted lines. Fig. 3 is a vertical sectiondiagonally through the presser of the device taken on line 33 of Fig. 4.Fig. 4 is a bottom plan view of said presser. Fig. 5 shows the pullingrod in side elevation, and Fig. 6 is a perspective view of the presserfoot. y

The device comprises a base-plate 1 preferably provided with bevelededges as indicatod at 2 in Fig. 2. A spring 3 is secured to the flat topsurface of the base-plate by means of screws 4 or the like and has tend-Specifica'tion 'of Letters Patent.

Patented Mar. 16, 1915 Serial No. 751,937.

ency to press upwardly any material placed on the top surface of thebase-plate. An angular stop indicated as a whole at 5 is mounted on thebase-plate 1 and comprises two rectangular walls 6 and 7 which arerecessed at their intersection, to form a vertical gap 8 for a purposewhich will be described below.

Means for securing flexible material to a rounded corner of a bookcover, or any other plate are illustrated in Figs. 1 to 3. A presser 9of substantially square cross section has one rounded corner 10 to fitinto the fillet 11 of the angular stop 5 on the baseplate 1. Thispresser also contains a foot having a plate 12 and pins 13 whereby it isguided in vertical direction in suitable bores or apertures of the foot.The foot plate 12 is pressed normally away from an offset portion 14 atthe bottom of the presser 9 by means of a spring 14 acting against thetop surface of the plate and inserted in a hole, extending from thebottom of the presser upwardly. The foot plate 12 is secured againstbeing expelled by the spring 14 from the presser 9 by means of a screw15 which projects into one of the bores for the pins 13. The pins areprovided with a longitudinal recess 16 and one shoulder 17 of the recessserves, when in engagement with screw 15 for limiting the inwardmovement of the foot plate, while the other shoulder 18 limits theoutward movement thereof. When the presser 9 is moved downwardly inguiding engagement with the angular stop it will press the foot plate 12resiliently against the top surface of a cover placed on the base-plate,said top surface preferably being the inner surface of the cover whenthe binding is complete. In the downward movement of the presser thefoot plate 12 will approach gradually the recessed bottom surface 14 ofthe presser. The

projecting part 19 of the bottom surface extends from the rounded cornerof the presser along the edges which in the movement of the same remainin engagement with the angular stop.

A pulling rod 20 is slidably held in diagonal direction within thepresser 9. It is movably mounted within a bore 21 which extends from thelower rounded corner of the presser upwardly to the front wall thereof.The upper end of the guiding aperture 21 for the pulling rod 20 isclosed by means of a screw plug 22 which has a bore spring 24. F or thispurpose a pin 27 ex tends diagonally through the presser 9 in ahorizontal plane, intersecting however, the guiding bore 21 of thepulling rod. l/Vhen the spring 2st presses the pulling rod downwardlythe transverse pin 27 engages ,one shoulder of the recess 26, as shown,and thereby limits the downward movement of the .same. On a portion ofthe pulling rod which is diametrically opposite the recess 26 and closerto the lower end of the rod another recess 28 is cut into the rod andthe locking device indicated as a whole by 29 serves for holding the rodin its uppermost position. This locking device includes a springcontrolled pin 30 guided in an oblique bore 31 of the presser. This pinis provided near its lower end with a collar 32 and a spring 33 engagessaid collar, the other .end of the spring resting against the innerbottom surface of a hollow nut 3% which closes ad-justably the obliqueaperture 31 in the pressure device. The movement of the pin iscontrolled by an arm 35 secured to the projecting end of the pin andcarrying a trans erse pin 36 which projects through a depending end ofsaid arm. The pin 30 projects into the recess 28 of the pulling rod whenthe pressure device is in engagement with the inner surface of the bookcover. The forward edges of the recess 8 are cut away as indicated at 40providing recesses in which the transverse pin 36 may operate as thepresser 9 is moved downwardly from the position shown in Fig. 1. It willbe seen, however, that the upper portions of the edges just mentionedare not cut away to any marked extent and these upper portions of theforward edges of the recess 8 serve as cam surfaces l0 which contactwith the pin 36 when the presser 9 is lifted from the position shown inFig. 1, thus forcing the pin 36 and pin 30 outwardly, for a reason whichwill later appear.

The operation of the device is about as follows: The principal object ofthe apparatus is to secure the corner of a cloth cover or the like tothe corner of a board; the board X is provided on one side of the samewit-h a cover of cloth or some similar material as indicated at Y. Themarginal cated at y. The cloth Y and the marginal portions y may besecured to the board X by means of an adhesive. The apparatus now servesfor folding over the corner portion 2 over the corner of the board X andto pull the corner portion a in diagonal direction so that this cornerportion will overlie smoothly the corner portion of the board X. Theboard X with the cloth applied thereto is therefore placed on the baseplate, as indicated in Fig. 2, whereby the corner of the board X engagesthe fillet 11 of the stop 5. The presser 9 is then forcibly moveddownwardly, while being held in en gagement with the wall portions 6 and7 of the stop 5 as indicated in dotted lines in Fig. 2. The foot plate12 of the presser 9 will ngage the marginal portions of the cloth coverY, also as shown in Fig. 2. In the continued downward movement of thepresser 9 the lower end of the pulling rod 20 will engage the inturnedportion .2 of the cloth by means of the prongs 37 at the lower end ofthe rod 20. Owing to this engagement and the downward movement of the9Q, presser, the rod 20 will be forced upwardly in the bore 21. lVhilethe rod 20 is moved upwardly in its bore with respect to the descendingpresser 9, the distance between the lower front end of the rod 20 fromthe cor- 5 ner of the presser 9 is increased from the distance indicatedin Fig. 3 by cl to the distance (Z. The prongs 37 do not release theirhold on the corner portion a while the presser is moved downwardly andthe board X is also prevented from moving since it is being pressedagainst the plate 1 by the foot 12. The cloth of the corner portion 2,therefore will also :be pulled inwardly in diagonal direction and theapplication of this corner portion to the book-cover is performed by asingle downward movement of the presser in contra-distinction from theknown methods in which this corner portion was applied manually and by arather 11o tedious operation only. The arm 36 of the locking device 29is forced into engagement with the cam portions 40 of the walls at thegap 8 of the angular stop. The pressure of the spring 33 acts on thecollar 32 of the pin 11-5 30 and this pin also carries the element 35 inwhich the arm 36 is mounted. Vhen therefore the presser 9 is withdrawnfrom the base-plate 1 upwardly, this arm 36 slides on the concave camportions 40 and with- 120 draws the pin 30 from the recess 28. In thedownward movement, however, this pin may project into this recess owingto the concave wall portions 40 which admit of an inward movement of thearm 36.

The presser 9 may be inserted in a punch press or a book-binding machineand is provided therefore at its upper portion with an aperture -12 anda ledge l1. A bolt, not shown, may be inserted through the apr- 130 ture42 and may connect the presser with the reciprocating element of themachine, not shown. The spring 3 on the base-plate lifts the board X assoon as the presser 9 is moved upwardly.

I claim:

1. A device for making book covers comprising in combination, verticallymovable means for pressing a strip against the board to be covered withthe strip, means for pulling the strip over the board at the corner ofthe board, and releasable means for holding the pulling means.

2. A device for making book covers comprising in combination, a supportfor the work, movable means for pressing a strip against the cover boardat one corner, means engaging the strip and pulling it while thepressing means acts on it, and means whereby the engagement of saidpulling means is controlled by the movement of said pressing means.

3. A device for making book covers comprising in combination, an angularstop for defining the position of the board the corner of which is to becovered by a strip, a presser guided in said angular stop, a pulling roddiagonally disposed within said presser, and means within said presserfor resiliently forcing said pulling rod in a diagonal directiondownwardly.

i. A device for making book covers comprising in combination abase-plate supporting the board to be covered by a corner strip, apresser, a foot plate mounted in said presser and adapted to engagemarginal portions of said corner strip and a pulling rod adapted toengage other portions of the corner strip, said pulling rod beingmovably mounted in an oblique direction within said presser, whereby therod is shifted par allel to itself in the vertical movement of saidpresser. v

5. A device for making book covers comprising in combination abase-plate supporting a board to be covered by a corner strip, apresser, a foot-plate resiliently mounted within said presser forengaging the board and marginal portions of the corner strip, a pullingrod obliquely disposed within said presser whereby the rod is shiftedparallel to itself in the vertical movement of said presser, saidpulling rod being in engagement with other portions of the corner strip.

6. A device for making book covers comprising in combination a baseplate supporting a board to be covered by a corner strip, an angularstop defining the position of a corner of said board, a presser guidedby said angular stop, a foot plate resiliently mounted on said presserfor engaging said board and marginal portions of said corner strip,means for limiting the movement of said foot plate with respect to thepresser,

and a pulling rod obliquely disposed within said presser whereby the rodis shifted parallel to itself when the presser is moved in a verticaldirection, said pulling rod being in engagement with another portion ofthe cover strip.

7. A device for making book covers comprising in combination, a baseplate sup porting a board to be covered by a corner strip, an angularstop on said base plate for defining the position of the corner of theboard, a presser guided by the angular stop, a foot plate resilientlymounted within said presser for engaging said board and marginalportions of the corner strip, a pulling rod obliquely disposed withinsaid presser whereby the rod is shifted parallel to itself in thevertical movement of the presser, said pulling rod being in engagementwith another portion of the corner strip, and means disposed within saidpresser for normally forcing the pulling rod downwardly with respect tothe presser.

8. A device for making book covers comprising in combination a baseplate support ing a board which is to be covered by a corner strip, anangular stop on said base plate defining the position of the corner ofthe board, a presser in guiding engagement with said angular stop, afoot plate mounted in said presser and engaging marginal portions of thecorner strip, a pulling rod angularly disposed within said presser andarranged to engage another portion of the corner strip, means fornormally forcing said pulling rod downwardly with respect to thepresser, and means for limiting the downward movement of the pulling rodwith respect to the presser.

9. A device for making book covers comprising in combination a baseplate for supporting the board to be covered by a corner strip, anangular stop mounted on said base plate, a presser in guiding engagementfor vertical movement with said angular stop, a foot plate mounted insaid presser, a pulling rod angularly disposed within said presser,means for normally forcing said pulling rod downwardly in the presser,the arrangement being such that said pulling rod is pressed inwardlywith respect to the presser by the downward movement of the presser whenthe pulling rod is in engagement with another portion of the coverstrip, and releasable means for holding said pulling rod against saidfirst mentioned means.

10. A device for making book covers comprising in combination a baseplate for supporting a board to be covered by a corner strip, an angularstop on said base plate defining the position of the corner of theboard, a presser in engagement with the angular stop, a pulling rodwithin said presser and mounted at an angle to the direction of movementof said presser and means disposed within said presser for resilientlyforcing the pulling rod downwardly in the presser, the arrangement beingsuch that said pulling rod is forced inwardly by the downward movementof the presser when the lower end of the rod is in engagement with aportion of the corner strip, and releasable means for holding said rodagainst said resilient means.

11. A device for making book-covers comprising in combination a baseplate supporting a board to be covered by a corner strip, an angularstop provided with a vertical gap mounted on said base plate andarranged to define the position of a corner of the board to be covered,a presser guided by said stop, a pulling rod angularly disposed withrespect to said presser for engaging a portion of the corner strip andinclined away from the angle of said stop, means for normally forcingthe pulling rod downwardly, said pulling rod being forced away from saidstop by the downward movement of the presser with respect to the boardwhen the Pulling rod is in engagement with a portionof the corner strip,resilient means for holding said pulling rod at the limit of itsmovement and means in engagement with the walls of the gap in 30 Copiesof this patent may be obtained for five cents each, by addressinghtheCommissioner oi Patents,

Washington, D. G.

